mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2024-11-04 06:00:37 +00:00
567 lines
22 KiB
C++
567 lines
22 KiB
C++
#include <time.h>
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#include <stdio.h>
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#include <cryptopp/sha.h>
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#include <cryptopp/osrng.h>
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#include <cryptopp/dsa.h>
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#include "util/base64.h"
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#include "crypto/CryptoConst.h"
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#include "crypto/ElGamal.h"
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#include "RouterContext.h"
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#include "Identity.h"
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#include "util/I2PEndian.h"
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namespace i2p
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{
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namespace data
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{
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Identity& Identity::operator=(const Keys& keys)
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{
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// copy public and signing keys together
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memcpy (publicKey, keys.publicKey, sizeof (publicKey) + sizeof (signingKey));
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memset (&certificate, 0, sizeof (certificate));
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return *this;
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}
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size_t Identity::FromBuffer (const uint8_t * buf, size_t len)
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{
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memcpy (publicKey, buf, DEFAULT_IDENTITY_SIZE);
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return DEFAULT_IDENTITY_SIZE;
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}
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IdentHash Identity::Hash () const
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{
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IdentHash hash;
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CryptoPP::SHA256().CalculateDigest(hash, publicKey, DEFAULT_IDENTITY_SIZE);
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return hash;
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}
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IdentityEx::IdentityEx ():
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m_Verifier (nullptr), m_ExtendedLen (0), m_ExtendedBuffer (nullptr)
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{
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}
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IdentityEx::IdentityEx(const uint8_t * publicKey, const uint8_t * signingKey, SigningKeyType type)
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{
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memcpy (m_StandardIdentity.publicKey, publicKey, sizeof (m_StandardIdentity.publicKey));
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if (type != SIGNING_KEY_TYPE_DSA_SHA1)
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{
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size_t excessLen = 0;
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uint8_t * excessBuf = nullptr;
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switch (type)
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{
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case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
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{
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size_t padding = 128 - i2p::crypto::ECDSAP256_KEY_LENGTH; // 64 = 128 - 64
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i2p::context.GetRandomNumberGenerator ().GenerateBlock (m_StandardIdentity.signingKey, padding);
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memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::ECDSAP256_KEY_LENGTH);
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break;
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}
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case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
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{
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size_t padding = 128 - i2p::crypto::ECDSAP384_KEY_LENGTH; // 32 = 128 - 96
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i2p::context.GetRandomNumberGenerator ().GenerateBlock (m_StandardIdentity.signingKey, padding);
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memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::ECDSAP384_KEY_LENGTH);
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break;
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}
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case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
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{
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memcpy (m_StandardIdentity.signingKey, signingKey, 128);
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excessLen = i2p::crypto::ECDSAP521_KEY_LENGTH - 128; // 4 = 132 - 128
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excessBuf = new uint8_t[excessLen];
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memcpy (excessBuf, signingKey + 128, excessLen);
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break;
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}
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case SIGNING_KEY_TYPE_RSA_SHA256_2048:
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{
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memcpy (m_StandardIdentity.signingKey, signingKey, 128);
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excessLen = i2p::crypto::RSASHA2562048_KEY_LENGTH - 128; // 128 = 256 - 128
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excessBuf = new uint8_t[excessLen];
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memcpy (excessBuf, signingKey + 128, excessLen);
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break;
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}
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case SIGNING_KEY_TYPE_RSA_SHA384_3072:
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{
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memcpy (m_StandardIdentity.signingKey, signingKey, 128);
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excessLen = i2p::crypto::RSASHA3843072_KEY_LENGTH - 128; // 256 = 384 - 128
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excessBuf = new uint8_t[excessLen];
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memcpy (excessBuf, signingKey + 128, excessLen);
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break;
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}
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case SIGNING_KEY_TYPE_RSA_SHA512_4096:
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{
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memcpy (m_StandardIdentity.signingKey, signingKey, 128);
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excessLen = i2p::crypto::RSASHA5124096_KEY_LENGTH - 128; // 384 = 512 - 128
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excessBuf = new uint8_t[excessLen];
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memcpy (excessBuf, signingKey + 128, excessLen);
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break;
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}
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case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
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{
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size_t padding = 128 - i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH; // 96 = 128 - 32
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i2p::context.GetRandomNumberGenerator ().GenerateBlock (m_StandardIdentity.signingKey, padding);
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memcpy (m_StandardIdentity.signingKey + padding, signingKey, i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH);
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break;
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}
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default:
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LogPrint ("Signing key type ", (int)type, " is not supported");
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}
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m_ExtendedLen = 4 + excessLen; // 4 bytes extra + excess length
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// fill certificate
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m_StandardIdentity.certificate.type = CERTIFICATE_TYPE_KEY;
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m_StandardIdentity.certificate.length = htobe16 (m_ExtendedLen);
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// fill extended buffer
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m_ExtendedBuffer = new uint8_t[m_ExtendedLen];
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htobe16buf (m_ExtendedBuffer, type);
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htobe16buf (m_ExtendedBuffer + 2, CRYPTO_KEY_TYPE_ELGAMAL);
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if (excessLen && excessBuf)
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{
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memcpy (m_ExtendedBuffer + 4, excessBuf, excessLen);
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delete[] excessBuf;
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}
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// calculate ident hash
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uint8_t * buf = new uint8_t[GetFullLen ()];
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ToBuffer (buf, GetFullLen ());
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CryptoPP::SHA256().CalculateDigest(m_IdentHash, buf, GetFullLen ());
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delete[] buf;
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}
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else // DSA-SHA1
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{
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memcpy (m_StandardIdentity.signingKey, signingKey, sizeof (m_StandardIdentity.signingKey));
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memset (&m_StandardIdentity.certificate, 0, sizeof (m_StandardIdentity.certificate));
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m_IdentHash = m_StandardIdentity.Hash ();
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m_ExtendedLen = 0;
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m_ExtendedBuffer = nullptr;
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}
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CreateVerifier ();
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}
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IdentityEx::IdentityEx (const uint8_t * buf, size_t len):
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m_Verifier (nullptr), m_ExtendedLen (0), m_ExtendedBuffer (nullptr)
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{
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FromBuffer (buf, len);
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}
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IdentityEx::IdentityEx (const IdentityEx& other):
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m_Verifier (nullptr), m_ExtendedBuffer (nullptr)
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{
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*this = other;
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}
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IdentityEx::~IdentityEx ()
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{
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delete m_Verifier;
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delete[] m_ExtendedBuffer;
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}
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IdentityEx& IdentityEx::operator=(const IdentityEx& other)
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{
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memcpy (&m_StandardIdentity, &other.m_StandardIdentity, DEFAULT_IDENTITY_SIZE);
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m_IdentHash = other.m_IdentHash;
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delete[] m_ExtendedBuffer;
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m_ExtendedLen = other.m_ExtendedLen;
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if (m_ExtendedLen > 0)
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{
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m_ExtendedBuffer = new uint8_t[m_ExtendedLen];
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memcpy (m_ExtendedBuffer, other.m_ExtendedBuffer, m_ExtendedLen);
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}
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else
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m_ExtendedBuffer = nullptr;
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delete m_Verifier;
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m_Verifier = nullptr;
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return *this;
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}
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IdentityEx& IdentityEx::operator=(const Identity& standard)
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{
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m_StandardIdentity = standard;
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m_IdentHash = m_StandardIdentity.Hash ();
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delete[] m_ExtendedBuffer;
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m_ExtendedBuffer = nullptr;
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m_ExtendedLen = 0;
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delete m_Verifier;
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m_Verifier = nullptr;
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return *this;
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}
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size_t IdentityEx::FromBuffer (const uint8_t * buf, size_t len)
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{
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if (len < DEFAULT_IDENTITY_SIZE)
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{
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LogPrint (eLogError, "Identity buffer length ", len, " is too small");
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return 0;
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}
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memcpy (&m_StandardIdentity, buf, DEFAULT_IDENTITY_SIZE);
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delete[] m_ExtendedBuffer;
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if (m_StandardIdentity.certificate.length)
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{
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m_ExtendedLen = be16toh (m_StandardIdentity.certificate.length);
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if (m_ExtendedLen + DEFAULT_IDENTITY_SIZE <= len)
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{
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m_ExtendedBuffer = new uint8_t[m_ExtendedLen];
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memcpy (m_ExtendedBuffer, buf + DEFAULT_IDENTITY_SIZE, m_ExtendedLen);
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}
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else
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{
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LogPrint (eLogError, "Certificate length ", m_ExtendedLen, " exceeds buffer length ", len - DEFAULT_IDENTITY_SIZE);
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return 0;
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}
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}
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else
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{
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m_ExtendedLen = 0;
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m_ExtendedBuffer = nullptr;
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}
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CryptoPP::SHA256().CalculateDigest(m_IdentHash, buf, GetFullLen ());
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delete m_Verifier;
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m_Verifier = nullptr;
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return GetFullLen ();
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}
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size_t IdentityEx::ToBuffer (uint8_t * buf, size_t len) const
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{
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memcpy (buf, &m_StandardIdentity, DEFAULT_IDENTITY_SIZE);
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if (m_ExtendedLen > 0 && m_ExtendedBuffer)
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memcpy (buf + DEFAULT_IDENTITY_SIZE, m_ExtendedBuffer, m_ExtendedLen);
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return GetFullLen ();
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}
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size_t IdentityEx::FromBase64(const std::string& s)
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{
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uint8_t buf[1024];
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auto len = i2p::util::Base64ToByteStream (s.c_str(), s.length(), buf, 1024);
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return FromBuffer (buf, len);
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}
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std::string IdentityEx::ToBase64 () const
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{
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uint8_t buf[1024];
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char str[1536];
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size_t l = ToBuffer (buf, 1024);
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size_t l1 = i2p::util::ByteStreamToBase64 (buf, l, str, 1536);
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str[l1] = 0;
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return std::string (str);
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}
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size_t IdentityEx::GetSigningPublicKeyLen () const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->GetPublicKeyLen ();
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return 128;
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}
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size_t IdentityEx::GetSigningPrivateKeyLen () const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->GetPrivateKeyLen ();
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return GetSignatureLen ()/2;
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}
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size_t IdentityEx::GetSignatureLen () const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->GetSignatureLen ();
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return 40;
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}
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bool IdentityEx::Verify (const uint8_t * buf, size_t len, const uint8_t * signature) const
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{
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if (!m_Verifier) CreateVerifier ();
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if (m_Verifier)
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return m_Verifier->Verify (buf, len, signature);
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return false;
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}
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SigningKeyType IdentityEx::GetSigningKeyType () const
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{
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if (m_StandardIdentity.certificate.type == CERTIFICATE_TYPE_KEY && m_ExtendedBuffer)
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return bufbe16toh (m_ExtendedBuffer); // signing key
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return SIGNING_KEY_TYPE_DSA_SHA1;
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}
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CryptoKeyType IdentityEx::GetCryptoKeyType () const
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{
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if (m_StandardIdentity.certificate.type == CERTIFICATE_TYPE_KEY && m_ExtendedBuffer)
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return bufbe16toh (m_ExtendedBuffer + 2); // crypto key
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return CRYPTO_KEY_TYPE_ELGAMAL;
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}
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void IdentityEx::CreateVerifier () const
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{
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auto keyType = GetSigningKeyType ();
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switch (keyType)
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{
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case SIGNING_KEY_TYPE_DSA_SHA1:
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m_Verifier = new i2p::crypto::DSAVerifier (m_StandardIdentity.signingKey);
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break;
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case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
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{
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size_t padding = 128 - i2p::crypto::ECDSAP256_KEY_LENGTH; // 64 = 128 - 64
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m_Verifier = new i2p::crypto::ECDSAP256Verifier (m_StandardIdentity.signingKey + padding);
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break;
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}
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case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
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{
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size_t padding = 128 - i2p::crypto::ECDSAP384_KEY_LENGTH; // 32 = 128 - 96
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m_Verifier = new i2p::crypto::ECDSAP384Verifier (m_StandardIdentity.signingKey + padding);
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break;
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}
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case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
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{
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uint8_t signingKey[i2p::crypto::ECDSAP521_KEY_LENGTH];
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memcpy (signingKey, m_StandardIdentity.signingKey, 128);
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size_t excessLen = i2p::crypto::ECDSAP521_KEY_LENGTH - 128; // 4 = 132- 128
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memcpy (signingKey + 128, m_ExtendedBuffer + 4, excessLen); // right after signing and crypto key types
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m_Verifier = new i2p::crypto::ECDSAP521Verifier (signingKey);
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break;
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}
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case SIGNING_KEY_TYPE_RSA_SHA256_2048:
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{
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uint8_t signingKey[i2p::crypto::RSASHA2562048_KEY_LENGTH];
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memcpy (signingKey, m_StandardIdentity.signingKey, 128);
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size_t excessLen = i2p::crypto::RSASHA2562048_KEY_LENGTH - 128; // 128 = 256- 128
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memcpy (signingKey + 128, m_ExtendedBuffer + 4, excessLen); // right after signing and crypto key types
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m_Verifier = new i2p::crypto:: RSASHA2562048Verifier (signingKey);
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break;
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}
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case SIGNING_KEY_TYPE_RSA_SHA384_3072:
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{
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uint8_t signingKey[i2p::crypto::RSASHA3843072_KEY_LENGTH];
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memcpy (signingKey, m_StandardIdentity.signingKey, 128);
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size_t excessLen = i2p::crypto::RSASHA3843072_KEY_LENGTH - 128; // 256 = 384- 128
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memcpy (signingKey + 128, m_ExtendedBuffer + 4, excessLen); // right after signing and crypto key types
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m_Verifier = new i2p::crypto:: RSASHA3843072Verifier (signingKey);
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break;
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}
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case SIGNING_KEY_TYPE_RSA_SHA512_4096:
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{
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uint8_t signingKey[i2p::crypto::RSASHA5124096_KEY_LENGTH];
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memcpy (signingKey, m_StandardIdentity.signingKey, 128);
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size_t excessLen = i2p::crypto::RSASHA5124096_KEY_LENGTH - 128; // 384 = 512- 128
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memcpy (signingKey + 128, m_ExtendedBuffer + 4, excessLen); // right after signing and crypto key types
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m_Verifier = new i2p::crypto:: RSASHA5124096Verifier (signingKey);
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break;
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}
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case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
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{
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size_t padding = 128 - i2p::crypto::EDDSA25519_PUBLIC_KEY_LENGTH; // 96 = 128 - 32
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m_Verifier = new i2p::crypto::EDDSA25519Verifier (m_StandardIdentity.signingKey + padding);
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break;
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}
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default:
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LogPrint ("Signing key type ", (int)keyType, " is not supported");
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}
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}
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void IdentityEx::DropVerifier ()
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{
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auto verifier = m_Verifier;
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m_Verifier = nullptr; // TODO: make this atomic
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delete verifier;
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}
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PrivateKeys& PrivateKeys::operator=(const Keys& keys)
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{
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m_Public = Identity (keys);
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memcpy (m_PrivateKey, keys.privateKey, 256); // 256
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memcpy (m_SigningPrivateKey, keys.signingPrivateKey, m_Public.GetSigningPrivateKeyLen ());
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delete m_Signer;
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m_Signer = nullptr;
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CreateSigner ();
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return *this;
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}
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PrivateKeys& PrivateKeys::operator=(const PrivateKeys& other)
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{
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m_Public = other.m_Public;
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memcpy (m_PrivateKey, other.m_PrivateKey, 256); // 256
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memcpy (m_SigningPrivateKey, other.m_SigningPrivateKey, m_Public.GetSigningPrivateKeyLen ());
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delete m_Signer;
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m_Signer = nullptr;
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CreateSigner ();
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return *this;
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}
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size_t PrivateKeys::FromBuffer (const uint8_t * buf, size_t len)
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{
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size_t ret = m_Public.FromBuffer (buf, len);
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memcpy (m_PrivateKey, buf + ret, 256); // private key always 256
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ret += 256;
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size_t signingPrivateKeySize = m_Public.GetSigningPrivateKeyLen ();
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memcpy (m_SigningPrivateKey, buf + ret, signingPrivateKeySize);
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ret += signingPrivateKeySize;
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delete m_Signer;
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m_Signer = nullptr;
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CreateSigner ();
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return ret;
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}
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size_t PrivateKeys::ToBuffer (uint8_t * buf, size_t len) const
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{
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size_t ret = m_Public.ToBuffer (buf, len);
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memcpy (buf + ret, m_PrivateKey, 256); // private key always 256
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ret += 256;
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size_t signingPrivateKeySize = m_Public.GetSigningPrivateKeyLen ();
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memcpy (buf + ret, m_SigningPrivateKey, signingPrivateKeySize);
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ret += signingPrivateKeySize;
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return ret;
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}
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size_t PrivateKeys::FromBase64(const std::string& s)
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{
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uint8_t * buf = new uint8_t[s.length ()];
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size_t l = i2p::util::Base64ToByteStream (s.c_str (), s.length (), buf, s.length ());
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size_t ret = FromBuffer (buf, l);
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delete[] buf;
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return ret;
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}
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std::string PrivateKeys::ToBase64 () const
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{
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uint8_t * buf = new uint8_t[GetFullLen ()];
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char * str = new char[GetFullLen ()*2];
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size_t l = ToBuffer (buf, GetFullLen ());
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size_t l1 = i2p::util::ByteStreamToBase64 (buf, l, str, GetFullLen ()*2);
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str[l1] = 0;
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delete[] buf;
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std::string ret(str);
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delete[] str;
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return ret;
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}
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void PrivateKeys::Sign (const uint8_t * buf, int len, uint8_t * signature) const
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{
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if (m_Signer)
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m_Signer->Sign (i2p::context.GetRandomNumberGenerator (), buf, len, signature);
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}
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void PrivateKeys::CreateSigner ()
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{
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switch (m_Public.GetSigningKeyType ())
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{
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case SIGNING_KEY_TYPE_DSA_SHA1:
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m_Signer = new i2p::crypto::DSASigner (m_SigningPrivateKey);
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break;
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case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
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m_Signer = new i2p::crypto::ECDSAP256Signer (m_SigningPrivateKey);
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break;
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case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
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m_Signer = new i2p::crypto::ECDSAP384Signer (m_SigningPrivateKey);
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break;
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case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
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m_Signer = new i2p::crypto::ECDSAP521Signer (m_SigningPrivateKey);
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break;
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case SIGNING_KEY_TYPE_RSA_SHA256_2048:
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m_Signer = new i2p::crypto::RSASHA2562048Signer (m_SigningPrivateKey);
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break;
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case SIGNING_KEY_TYPE_RSA_SHA384_3072:
|
|
m_Signer = new i2p::crypto::RSASHA3843072Signer (m_SigningPrivateKey);
|
|
break;
|
|
case SIGNING_KEY_TYPE_RSA_SHA512_4096:
|
|
m_Signer = new i2p::crypto::RSASHA5124096Signer (m_SigningPrivateKey);
|
|
break;
|
|
case SIGNING_KEY_TYPE_EDDSA_SHA512_ED25519:
|
|
m_Signer = new i2p::crypto::EDDSA25519Signer (m_SigningPrivateKey);
|
|
break;
|
|
default:
|
|
LogPrint ("Signing key type ", (int)m_Public.GetSigningKeyType (), " is not supported");
|
|
}
|
|
}
|
|
|
|
PrivateKeys PrivateKeys::CreateRandomKeys (SigningKeyType type)
|
|
{
|
|
if (type != SIGNING_KEY_TYPE_DSA_SHA1)
|
|
{
|
|
PrivateKeys keys;
|
|
auto& rnd = i2p::context.GetRandomNumberGenerator ();
|
|
// signature
|
|
uint8_t signingPublicKey[512]; // signing public key is 512 bytes max
|
|
switch (type)
|
|
{
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA256_P256:
|
|
i2p::crypto::CreateECDSAP256RandomKeys (rnd, keys.m_SigningPrivateKey, signingPublicKey);
|
|
break;
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA384_P384:
|
|
i2p::crypto::CreateECDSAP384RandomKeys (rnd, keys.m_SigningPrivateKey, signingPublicKey);
|
|
break;
|
|
case SIGNING_KEY_TYPE_ECDSA_SHA512_P521:
|
|
i2p::crypto::CreateECDSAP521RandomKeys (rnd, keys.m_SigningPrivateKey, signingPublicKey);
|
|
break;
|
|
case SIGNING_KEY_TYPE_RSA_SHA256_2048:
|
|
i2p::crypto::CreateRSARandomKeys (rnd, i2p::crypto::RSASHA2562048_KEY_LENGTH, keys.m_SigningPrivateKey, signingPublicKey);
|
|
break;
|
|
case SIGNING_KEY_TYPE_RSA_SHA384_3072:
|
|
i2p::crypto::CreateRSARandomKeys (rnd, i2p::crypto::RSASHA3843072_KEY_LENGTH, keys.m_SigningPrivateKey, signingPublicKey);
|
|
break;
|
|
case SIGNING_KEY_TYPE_RSA_SHA512_4096:
|
|
i2p::crypto::CreateRSARandomKeys (rnd, i2p::crypto::RSASHA5124096_KEY_LENGTH, keys.m_SigningPrivateKey, signingPublicKey);
|
|
break;
|
|
default:
|
|
LogPrint ("Signing key type ", (int)type, " is not supported. Create DSA-SHA1");
|
|
return PrivateKeys (i2p::data::CreateRandomKeys ()); // DSA-SHA1
|
|
}
|
|
// encryption
|
|
uint8_t publicKey[256];
|
|
CryptoPP::DH dh (i2p::crypto::elgp, i2p::crypto::elgg);
|
|
dh.GenerateKeyPair(rnd, keys.m_PrivateKey, publicKey);
|
|
// identity
|
|
keys.m_Public = IdentityEx (publicKey, signingPublicKey, type);
|
|
|
|
keys.CreateSigner ();
|
|
return keys;
|
|
}
|
|
return PrivateKeys (i2p::data::CreateRandomKeys ()); // DSA-SHA1
|
|
}
|
|
|
|
Keys CreateRandomKeys ()
|
|
{
|
|
Keys keys;
|
|
auto& rnd = i2p::context.GetRandomNumberGenerator ();
|
|
// encryption
|
|
i2p::crypto::GenerateElGamalKeyPair(rnd, keys.privateKey, keys.publicKey);
|
|
// signing
|
|
i2p::crypto::CreateDSARandomKeys (rnd, keys.signingPrivateKey, keys.signingKey);
|
|
return keys;
|
|
}
|
|
|
|
IdentHash CreateRoutingKey (const IdentHash& ident)
|
|
{
|
|
uint8_t buf[41]; // ident + yyyymmdd
|
|
memcpy (buf, (const uint8_t *)ident, 32);
|
|
time_t t = time (nullptr);
|
|
struct tm tm;
|
|
#ifdef _WIN32
|
|
gmtime_s(&tm, &t);
|
|
sprintf_s((char *)(buf + 32), 9, "%04i%02i%02i", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
|
|
#else
|
|
gmtime_r(&t, &tm);
|
|
sprintf((char *)(buf + 32), "%04i%02i%02i", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
|
|
#endif
|
|
IdentHash key;
|
|
CryptoPP::SHA256().CalculateDigest((uint8_t *)key, buf, 40);
|
|
return key;
|
|
}
|
|
|
|
XORMetric operator^(const IdentHash& key1, const IdentHash& key2)
|
|
{
|
|
XORMetric m;
|
|
const uint64_t * hash1 = key1.GetLL (), * hash2 = key2.GetLL ();
|
|
m.metric_ll[0] = hash1[0] ^ hash2[0];
|
|
m.metric_ll[1] = hash1[1] ^ hash2[1];
|
|
m.metric_ll[2] = hash1[2] ^ hash2[2];
|
|
m.metric_ll[3] = hash1[3] ^ hash2[3];
|
|
return m;
|
|
}
|
|
}
|
|
}
|